Comb Configuration
Steel needle spacing across the hackling machine board defines the output quality of combed flax fibre. Hackling comb pin density measures the count of individual steel needles per linear centimetre of the bar assembly. Higher counts facilitate the removal of short fibres and impurities from the primary flax line.
Lower counts allow more residual material to pass into the sliver.
Pinning Specification
Production logs record the settings for each batch to ensure the output aligns with spinning requirements for specific count yarns. Technicians calibrate the hackling apparatus by swapping bars to hit the target density for a particular flax grade. Standard mill operations designate bars with greater needle counts for fine line production while lower counts suit coarser long fibre processing.
Precise alignment prevents damage to the flax stock during the high speed mechanical straightening process. Adjusting these settings balances the extraction of short tow from the main line to maintain desired fibre length consistency.
Fibre Processing
Mills classify raw material batches by the length and cleanliness achieved after passing through specific needle arrays. Buyers verify these characteristics by reviewing samples against their internal fibre grade standards which specify the minimum tolerated hackling level. Woven cloth quality relies heavily on the uniformity established at this stage of the preparation sequence.
Proper maintenance of the needle geometry prevents inconsistent separation of the fibre bundles during the mechanical draft. Operators monitor the wear of the individual needles because blunt tips reduce the efficiency of the combing action. Consistent density of the pins ensures the reliability of the output for automated spinning equipment.
